Tension device for loom-shuttles.



PATENTED SEPT. 8, 1908.

No. 898,102. I

B. HAUVETTE.

TENSION DEVICE FOR LO OM SHUTTLES.

APPLICATION FILED FEB. 26, 1907. V 2 SHEETS-SHEET 1.

No. 898,102. 'PATENTED SEPT. 8,1908.

.J. E. HAUVETTE. TENSION DEVICE FOR LOOM SHUTTLES.

APPLICATION FILED FEB; 26, 1907. v

2 SHEETS-SHEET 2.

JULES EUGENE HAUVETTE, OF CLERMONT-FERRAND, FRANCE.

TENSION DEVICE FOR LDOM-SHUTTLES.

Specification off-Letters Patent.

Patented Sept. 8, 1908.

Application filed February 26, 1907. Serial No. $59,494:.

T 0 all whom it may concern:

- Be it known that I, JULEs EUoirNE HAU- vn'r'rn, citizen of the Republic of France,

and resident of Rue du Nord, Clermont-Ferrand, Puy-de-Dome, in the said Republic; have invented a new and useful Tension De vice for Loom-Shuttles, of which the following is a specification.

This invention relates to a shuttle with automatic regulator for giving'out and putting tension on the weft thread This automatic regulator insures a regular delivery of the threads and also a constant tension; it provents the said thread from kinking on leaving the bobbin, and consequently it improves the quality of the finished fabric. The proper action'of this regulator is itself insured. by

the regulator an action which is always uniform (exce t as regards tension).

The regu ator consists of a counter-weight capable of oscillating in a plane at right angles to the longitudinal axis of the shuttle and provided with an eye through which the weft thread asses. The tension of the lat ter in norma conditions maintains the counthe thread becomes slack, the counterweight drops and its eye. by movin the thread out of its normal position, stretc 168 it afresh. At the very commencement of the slackness,the

delivery of the movable" bobbin may likewise be stopped with advantage by means of .a stop which tightens the thread against a guide roller] Figure 1 of the accompanying drawing is a longitudinal section of the forward part of the shuttle embodying the invention, showing the regulator in its normal position of tension. Fig. 2 is a similar longitudinal section, but showing the weft thread slack, and the regulator in the corresponding position. Fig. 3 is a plan and shows the issue of the weft thread. Figs. 4 and 5 are two cross sections of the regulator, showing the latter respectively during the normal delivery of the weft thread, and during the slackness. Fig. 6 is a cross section taken along the axis of the guide roller and showing the position of the terwcight in a raised position, but as soon asw ich the thread of the bobbin stop during the normal delivery of the thread. Fig. 7 is a longitudinal sclion of a simplified practical form of the invention. Figs. 8 and 9 are two cross sections similar to Figs. 4t and 5. and showthe position of the counterweightof theregulator, respectively in the position of tension of the thread, and in its slack position.

The shuttle in Figs. 1 to 5 consists of an or-' dinary wooden shuttle body a in the internal chamber of which there is arranged a bobbin 12 carrying the weft thread. On leaving this bobbin the thread 0 passes through. the eye d of an ordinary small plate 6. This eye serves as a guide for the thread and keeps it applied with slight pressure against a roller f (see an the body-a of the shuttle there is fixed a art 9 provided with lugs 78 and 91 through )asses. By their form they prevent the thread from kinking and consequently aid in improving the quality of the fabric. 0n the part g is mounted a stop y' carrying a small tappet 7c; it is urged towards the center by a spring Z. In front of the lugs h and i on thejpart g, there is further provided a lug m provided with a central eye a inwhich the thread c changes its direction before issuing. from the shuttle.

The regulating apparatus consists in ore particular y of a counterweight o'oscillating about an upper longitudinal axle 0 in such a manner that the impact of the shuttle on entering shuttle box, shall have no eiiect upon the movements of this counterweight and shall allow it to act constantly under the same conditions as regulator. The counterwcight 0 carries on one hand a small lower eye 'q through which the weft thread 0 passes, and on the other hand a small linger 1' which, when the bobbin thread is unwound normally, bears upon the tappet it of the-stop and forces the latter back in such a manner as to free the roller j and allow the bobbin thread to unwind freely. The thread leaving the eye *npasses between two rollers s and t which are here substituted for the ordinary eye, and facilitate the exit of the weft thread (see Fig. 3-).

The operation of this shuttle follows :-With the normal delivery, the thread unwinds from the bobbin and its tension is sufiicient to maintairl, the counterweight o in the raised position K osition shown in' igs. l and i) but as soon as the tension of the unl no . actu al automatic regulator of the tension and delivery of'the weft thread,.-actingdi weight 0 is likewise provided. with the eye g,

positions respectively of the tensioif -and of g the slackness of the weft threadlr r wound thread becomes less and its delivery increases, the counterweight 0 drops and stretches the thread of the bobbin tight again. The finger r leaves the tappet hot the stop 7', and the latter being ushed by the spring Z, presses .againstthe r0 er f andthus arrests the unwinding ofthe thread-fromthe bobbin (position shown in Figs. 2 and 5)." .The thread c then resumes its'normal deliveryan'd causes the "counterweight o to risel agam. The finger 1" acts anew upon the tap:

.pet kof the. sto

andfforcesit back (See Fig. 6), ancL-the t read of the bobbin begins again to unwind itself freely. These same ases are repeated each time that the weft thread-becomes slack. This is therefore anrectly-by the tension ofthe latter. x a

; The shuttle shown in ,Fig. 7 is a simplified practical form of the invention. tleis similar in all respects to that which has part 9 comprises here neither the stop 7' nor itstappet, nor the spring Thecounterbut its'finger r is dispensed With, In this arrangement the counterweight acts simply as a tensioning device u on the weft thread a In that has passed out cm the shuttle. fact when the latter has a too great delivery the counterweight o drops and stretches the weft thread tight again, that, is to say-the latter maintains in all casesa' constant and uniform tension.

The 0' eration of the regulator -is analo germs-to t at described with referenceto the st practicalfo'rm 0fthe invention; .it is illustrated in the sections of Figs. 8 ands!) which show thecounterweight inthe two Having now.particularly des'cribed'the nature of this said invention. and. the. best means I know of carrying the same into prac tical effect I claim 1; In a weaving shuttle for automatically regulating the delivery and 'tension of the weft thread, the combination of a tension oounterweight arranged to pscillate in a plane transverse to -the longitudinal. axis of i the shuttle, said counterweight-being pro-" i vided with an eyelet for the passage of the thread, a friction roller for the thread carried by the shuttle body,

This shut been hereinbeforedescribed, except that the as p 898,102

by the shuttle body, and a springactuated sliding stop for pressing the, thread'against the-frlotion roller,said stop being under the control of the counterweight to relieve thev thread 1mm press'pre, against the friction roller.

"2, ln 'a wea'ving shuttle for automatically regulating the delivery and'tension of the ,weft thread,- the combination of a '-tension ounterweight, arranged to oscillate in a plane transverselto the longitudinal @XlS-Df the .sh'uttle, said'counterweightbeing proregulating the deliveryfand tension-of the weft thread, the combination Ofwii, friction roller carried by the "shuttle bodyfunder.

which the thread passes' 'after leaving the bobbin, a small late for lightly pressing the thread against t e roller, 'alstationary guide with two lugs for the passage of the thread, a counterweight arranged to oscillate in a press the stop-againstfthe friction'roller, and

plane transverse to'the longitudinal axis of 1 the, shuttle, said counterweight being provided with an eyelet for the assage of the thread, a sliding stop. carried ythe shuttle body, a spring acting upon the stop tending to make itpressthe thread against the roller when the counterweight is' in its lower position, a tappeton the stop, a-finger-on the counterwelght co-actm'g with the tappet when the counterweight israised to disen age the stop'from the roller, and a side Will of the shuttle providcdvwitha hole-for the exitof my invention, I have signed my name in presence oftwo Witnesses, this 15th dayjof February 1907. 1'

JULES EUGENE iii-U E TE.- Witnesses:

EUGENE GUYARD,

DEAN B'MASONe the thread, said hole being provided with a -roller on each side thereof. I

' In testimony, that I claim the foregoing as 

